I've always wanted to try PVB resin to tack the safety glass back on to the face of the CRT. Something like this:
http://www.ebay.com/itm/Re-Repair-Re...4&var=&vxp=mtr
I have no idea what version of the stuff I'd try - or what "CPS" is...
I'd go with just a thin line along the edges, and lower the safety glass onto the CRT carefully. It cures optically clear, so not much "show" and the safety plate would be within a millimeter of the CRT face, so no "shadow effect" caused by a gap.
My 21FJP in my CTC16 has a cataract, but it's in storage right now, so I'm a long way off from trying.